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US 7,479,732 B2Granted
Luminescence conversion of LED with phosphorescence effect, and use thereof and operational method associated therewith
AssigneeOSRAM Opto Semiconductors GmbH
InventorWolfgang Rossner
Life of this patent
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Abstract
A light source, comprising at least one LED for emitting primary radiation, and at least one phosphor for converting the primary radiation into secondary radiation. The secondary radiation has a decay time at room temperature of at least 0.1 seconds before the luminescence intensity of the secondary radiation is no longer perceptible to the human eye.
Claims16
A light source, comprising:
- at least one LED for emitting primary radiation, and
- at least one phosphor for converting the primary radiation (4) into secondary radiation,
- wherein the secondary radiation has a decay time at room temperature of at least 0.1 s before the luminescence intensity of the secondary radiation is no longer perceptible to the human eye, and the phosphor is selected from the group consisting of oxide, aluminate, and sulfide activated with the aid of a plurality of dopings so that the phosphor is phosphorescent.
Dependencies are inferred from the claim text.